in hotels, if you lose your room key card, how are they able to reprogram the new one so it works and the old one doesn’t?

Question

Is there some system that transmits information to your door card reader on what the new key is, or is it something different entirely?

In: 1028

Answer 1

The hotel I used to work, both keys would still work, until you swiped the new key, I guess like someone else said, it is a rolling code, until they new key is swiped, the old key would still work, however the lock keeps tracks of date, so whenever a new key is swiped, the lock knows when the new check out date is. Many times I had to go up to guests rooms to block their keys, by swiping a new key.